Portion of a container cover



FIG. 1 is a top perspective view of a portion of a container cover showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a side view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of a container cover, as shown and described. 